A while ago, i began to notice a loose shift from 3rd to 4th gear. It will begin to shift, hold rpm, then finish shifting after a second or so. When it is in this 'limbo stage' i have much less power. I tried to adjust my tv cable, and this just made the process occur faster. I also notice that it only happens when the transmission has had time to warm up after a few miles of driving, and is fine when it is cold. Anyone had this problem before? Hopefully its not too expensive of a fix. Thanks